<template>
	<section>
		<!--工具条: 高级查询和新增-->
		<el-col :span="24" class="toolbar" style="padding-bottom: 0px;">
			<el-form :inline="true">
				<el-form-item>
					<el-input v-model="keyword" placeholder="请输入关键字"></el-input>
				</el-form-item>
				<el-form-item>
					<el-button type="primary" @click="keywordQuery">查询</el-button>
				</el-form-item>
				<el-form-item>
					<el-button type="primary" @click="handleAdd">新增</el-button>
				</el-form-item>
			</el-form>
		</el-col>

		<!--分页列表-->
    <!--
  :data="menus" - 列表数据
  highlight-current-row - 当前行高亮
  v-loading="listLoading" - 加载框
  @selection-change="selsChange" - 批量操作要使用的方法
-->
    <el-table :data="menus" highlight-current-row v-loading="listLoading" @selection-change="selsChange"
              style="width: 100%;">
      <el-table-column type="selection" width="55">
      </el-table-column>
      <el-table-column type="index" width="60">
      </el-table-column>

      <el-table-column prop="name" label="名称" width="120">
      </el-table-column>
      <el-table-column prop="parent.name" label="父级菜单" width="100">
        <template scope="scope">
          <span style="color: #20a0ff" v-if="scope.row.parent">{{scope.row.parent.name}}</span>
          <span style="color: #8c939d" v-else>无父级菜单</span>
        </template>
      </el-table-column>
      <el-table-column prop="url" label="访问路径" width="120">
      </el-table-column>
      <el-table-column prop="component" label="组件路径" width="180">
      </el-table-column>
      <el-table-column prop="icon" label="图标" width="80">
      </el-table-column>
      <el-table-column prop="intro" label="简介" width="200" sortable>
      </el-table-column>
      <el-table-column prop="state" label="状态" width="120" sortable>
        <template scope="scope">
          <span style="color: #11b95c" v-if="scope.row.state==1">启用</span>
          <span style="color: red" v-else>禁用</span>
        </template>
      </el-table-column>
      <el-table-column label="操作">
        <template scope="scope">
          <el-button size="small" @click="handleSave(scope.$index, scope.row)">编辑</el-button>
          <el-button type="danger" size="small" @click="handleDel(scope.$index, scope.row)">删除</el-button>
        </template>
      </el-table-column>
		</el-table>

    <!--工具条：批量删除和分页栏-->
		<el-col :span="24" class="toolbar">
			<el-button type="danger" @click="batchRemove" :disabled="this.sels.length===0">批量删除</el-button>
			<el-pagination layout="prev, pager, next" @current-change="handleCurrentChange"
                     :current-page="currentPage" :page-size="pageSize" :total="totals" style="float:right;">
			</el-pagination>
		</el-col>

    <!--添加和修改的对话框 : 根据表字段添加-->
    <!--
      :title="title"  - 标题
      :visible.sync="saveFormVisible" - 控制对话框是否显示
      :close-on-click-modal="false" - 点击框外的区域不关闭
        :model="saveForm" - 表单数据是一个对象
        label-width="80px" - 标签的宽度
        :rules="saveFormRules" - 表单项验证
        ref="saveForm" - 给当前表单取一个名称 - 用来做表单验证
    -->
		<el-dialog :title="title" :visible.sync="saveFormVisible" :close-on-click-modal="false">
			<el-form :model="saveForm" label-width="80px" :rules="saveFormRules" ref="saveForm">
        <el-form-item label="上级部门">
          <!--
		        :options="options" - 数据 - 无限极树- 集合
            label:'name' - 回显哪一个属性值
            value:'id' - 传值，将id传递给v-model="saveForm.parent_id"
	        -->
          <el-cascader
              v-model="saveForm.parentId"
              :options="menuTree"
              :props="{
            	checkStrictly: true,
                label: 'name', // 级联框显示那个属性的值
                value: 'id'    // 回显时需要,回传值的时候也需要
            }"clearable>
          </el-cascader>
        </el-form-item>
				<el-form-item label="名称" prop="name">
					<el-input v-model="saveForm.name" auto-complete="off"></el-input>
				</el-form-item>
        <el-form-item label="排序" prop="index">
          <el-input-number v-model="saveForm.index" controls-position="right" @change="handleChange" :min="1" :max="10"></el-input-number>
        </el-form-item>
        <el-form-item label="访问路径" prop="url">
          <el-input v-model="saveForm.url" auto-complete="off"></el-input>
        </el-form-item>
        <el-form-item label="组件路径" prop="component">
          <el-input v-model="saveForm.component" auto-complete="off"></el-input>
        </el-form-item>
        <el-form-item label="图标" prop="icon">
          <el-input v-model="saveForm.icon" auto-complete="off"></el-input>
        </el-form-item>
				<el-form-item label="部门状态">
					<el-radio-group v-model="saveForm.state">
						<el-radio class="radio" :label="1">启用</el-radio>
						<el-radio class="radio" :label="0">禁用</el-radio>
					</el-radio-group>
				</el-form-item>
			</el-form>
      <!--
         @click.native="saveSubmit" - 点击提交的时候调用saveSubmit方法
         :loading="saveLoading" - 提交的加载加载框
       -->
			<div slot="footer" class="dialog-footer">
				<el-button @click.native="saveFormVisible = false">取消</el-button>
				<el-button type="primary" @click.native="saveSubmit" :loading="saveLoading">提交</el-button>
			</div>
		</el-dialog>

	</section>
</template>

<script>
	export default {
		data() {
			return {
        //1.分页查询相关数据
        menus: [],      //分页数据
        listLoading: false,   //加载框
        totals: 0,            //总数量
        currentPage: 1,       //当前页
        pageSize: 5,          //每页显示的条数

        //2.高级查询
        keyword: '',
        //3.输出相关的数据[无]

        //4.批量删除的相关数据
        sels: [],//列表选中列

        //5.添加和修改的相关数据
        title: '',
        saveFormVisible: false,   //控制对话框是否显示
        saveLoading: false,       //加载框
        saveFormRules: {
          //表单项中的prop属性,验证表单属性是否有值(是否有填写)
          name: [
            {required: true, message: '请输入名称', trigger: 'blur'}
          ],
          index: [
            {required: true, message: '请输入排序', trigger: 'blur'}
          ],
          url: [
            {required: true, message: '请输入访问路径', trigger: 'blur'}
          ],
          component: [
            {required: true, message: '请输入组件路径', trigger: 'blur'}
          ],
        },
        //编辑界面数据
        saveForm: {
          id: null,
          name: '',
          component: '',
          url:'',
          icon:'',
          index:'',
          parentId: null,
          intro:'',
          state: 1
        },

        //7.级联框上级部门
        menuTree: []
      }
    },
    //自定义方法
		methods: {
		  //1.分页查询,获取部门列表
      getMenus() {
        //组装参数
        let para = {
          //分页
          currentPage: this.currentPage,
          pageSize: this.pageSize,
          //高级查询
          keyword: this.keyword,
        };
        //显示加载框
        this.listLoading = true;
        //发送异步请求
        this.$http.post("/menu",para).then(res=>{
          this.totals = res.data.totals;
          this.menus = res.data.data;
          //隐藏加载框
          this.listLoading = false;
        }).catch(res=>{
          this.$message.error("网络繁忙,请稍后重试!")
        })
      },

      //2.点击分页的方法
      handleCurrentChange(val) {
        this.currentPage = val;
        this.getMenus();
      },

      //3.高级查询的方法
      keywordQuery(){
        this.currentPage = 1;
        this.getMenus();
      },
      //点击排序
      handleChange(value) {
        this.saveForm.index = value;
      },

      //4.删除
      handleDel: function (index, row) {
        this.$confirm('确认删除该记录吗?', '提示', {
          type: 'warning'
        }).then(() => { //确认框,点击确定走.then中的逻辑
          this.listLoading = true;
          this.$http.delete("/menu/"+row.id).then(res=>{
            this.listLoading = false;
            if(res.data.success){
              this.$message.success("删除成功");
              //计算总页数
              var totalPage = Math.ceil(this.totals/this.pageSize)
              //删除最后一页最后一条数据,而且不能是第一页时,让当前页 = 当前页-1
              if(this.currentPage == totalPage && this.currentPage >1 && (this.totals-1)%this.pageSize==0){
                this.currentPage = this.currentPage - 1;
              }
              this.getMenus();
            }else{
              this.$message.error("请检查网络!")//500错误走这里
            }
          }).catch(res=>{
            this.$message.error("请检查网络!")//服务器没开,404,400错误走这里
          })
        }).catch(() => {
        });
      },
      //5.批量删除选项改变时就会触发
      selsChange: function (sels) {
        this.sels = sels;
      },
      //6.批量删除的相关数据和逻辑
      batchRemove: function () {
        var ids = this.sels.map(item => item.id);
        this.$confirm('确认删除选中记录吗？', '提示', {
          type: 'warning'
        }).then(() => {
          this.listLoading = true;
          this.$http.patch("/menu",ids).then(res=>{
            this.listLoading = false;
            if(res.data.success){
              this.$message.success("删除成功");
              this.currentPage = 1;
              this.getMenus();
            }else{
              this.$message.error("请检查网络!")//500错误走这里
            }
          }).catch(res=>{
            this.$message.error("请检查网络!")//服务器没开,404,400错误走这里
          })
        }).catch(() => {
        });
      },
			//7.点击修改按钮弹出对话框
      handleSave: function (index, row) {
        //动态修改标题
        this.title = "编辑";
        //回显数据
				this.saveFormVisible = true;
				//将row对象赋值给{}对象,防止列表中的数据同时发生改变
				this.saveForm = Object.assign({}, row);
				this.saveFormVisible = true;
        //点击修改按钮获取部门树
        this.getMenuTree();
			},
			//8.点击添加按钮弹出对话框
			handleAdd: function () {
        //动态修改标题
        this.title = "添加";
        this.saveFormVisible = true;
				//将对话框内容清空
				this.saveForm = {
          id: null,
          name: '',
          component: '',
          url:'',
          icon:'',
          index:'',
          parentId: null,
          intro:'',
          state: 1
				};
        //点击添加按钮获取部门树
        this.getMenuTree();
			},
			//9.点击提交按钮,提交数据
			saveSubmit: function () {
        //将所有ref的表单找出来后把ref=saveForm,validate - 验证
				this.$refs.saveForm.validate((valid) => {
					if (valid) {
						this.$confirm('确认提交吗？', '提示', {}).then(() => {
						  //显示提交按钮的加载框
							this.saveLoading = true;
							let para = Object.assign({}, this.saveForm);

							//前端无限极树的处理:null,[],[2],[2,7],2
              if(para.parentId==null || para.parentId.length==0){
                para.parentId = null;
              }else if(para.parentId.length){//有值,没有报错,数组[2],[2,7]
                para.parentId = para.parentId[para.parentId.length-1];
              }

							//发送异步请求
              this.$http.put("/menu",para).then(res=>{
                //关闭提交按钮的加载框
                this.saveLoading = false;
                //关闭对话框
                this.saveFormVisible = false;
                if(res.data.success){
                  this.$message.success("操作成功");
                  this.getMenus();
                }else{
                  this.$message.error("请检查网络!")//500错误走这里
                }
              }).catch(res=>{
                this.$message.error("请检查网络!")//服务器没开,404,400,405错误走这里
              })
						});
					}
				});
			},

      //11.获取部门树
      getMenuTree(){
        this.$http.get("/menu/menuTree").then(res=>{
          this.menuTree = res.data;
        }).catch(res=>{
        })
      }
		},
		mounted() {
			this.getMenus();
		}
	}

</script>

<style scoped>

</style>